I've done that on other cars where space was tight. Shave the raised ring from the top of the truck bolster, add 36 inch wheels (MT length), and the car sits at its original height. It's almost as though MDC designed them to be converted to 100-ton trucks.
They may not be quite the right length, but they look bigger than the MT 70-ton RB, so don't look out of place. The larger wheels fill the empty space above the truck, and the car looks much better.
Many, many years ago, when N scale 100-ton trucks were only a dream, and 36 inch wheels meant expensive NWSL wheelsets, I bought a hundred pair of MDC trucks from Walthers as parts. They actually sold the various parts of the truck separately - frames, wheelsets, couplers, springs, etc. The wheels were junk, and I didn't need Rapido couplers, so I bought just the frames and pins, and put Precision Masters wheels in them. Much cheaper than MT, cheaper even than assembled MDC trucks, and the rolled very nicely.
